Canada and the United States share one of the largest contiguous borders in the world. Canada is diverse with mountains in the west, plains in the central regions, and lowlands in the southeast.
Greenland is the world's largest island and more than 80% of it is covered by ice. Greenland is mostly flat or sloping hills.
Mexico borders the southern United States, Guatemala and Belize. Its terrain is extremely varied from coastal plains to rugged mountain ranges, with more than 10% of the planet's biodiversity.
The United States is one of the most geographically diverse nations on Earth. Between its two coasts are rugged mountains, vast deserts and plains, the Grand Canyon and the heavily forest Pacific Northwest.